Questions about the 6400M. Can you use an external Maestro with the 6400M at the same time having both on? Also running the 6400M with a PC can the 6400M Maestro and HDMI output to a larger screen be on as well as the PC screen?
This is addressed in the FAQ. At the initial release, you can use the front panel -or- a different client (Maestro, SSDR, SSDR-iOS) to operate the radio. In a future release of SmartSDR v2, you will have an opportunity to operate in multi-client mode where the front panel is enabled at the same time you are using a software client to operate the radio. I have no time frames on when Multi-Client will be available.
Also running the 6400M with a PC can the 6400M Maestro and HDMI output to a larger screen be on as well as the PC screen?
In multi-client mode, that is one of the intended features. Again, this is not a promise, but what we intend to do. We will not know for certain until we code everything up and test it.